{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are storage fees handled in a blockchain?","a":"Database Optimization: Blockchain adopts specific database technologies such as LevelDB, RocksDB, and MySQL to store and manage data. These databases have high efficiency and  low latency, which is conducive to reducing the cost of storing and querying data."}]}],"pr":"94f1c4467864eedd0866ea24f88377188c1a95f211a46918e60fcb2d86935b29"}